Radioactive Check Sources | Alpha, Beta, Gamma and Mixed Isotopes
BNC provides a comprehensive lineup of high-quality check sources and disk sets for accurate calibration, verification, and performance testing of radiation detection equipment.
Designed for precise calibration and verification of:
- Isotope Identification Devices (IIDs / RIIDs)
- Radiation isotope identifiers
- Spectroscopic Personal Radiation Detectors (SPRDs)
- Gamma spectrometers
Ensures accurate performance, compliance with industry standards, and reliable isotope analysis. Compatible with devices such as SAM 940 and similar systems
These calibration accessories deliver consistent, traceable radiation sources to optimize detector accuracy and maintain operational readiness.
Check Sources
| Isotope | Atomic Number | Half-life | Mass Number | Decay Mode |
|---|---|---|---|---|
| Barium 133 (Ba-133) | 56 | 10.551 years | 133 (77 neutrons) | Electron Capture |
| Carbon 14 (C-14) | 6 | 5700 years | 14 (8 neutrons) | Beta |
| Cadmium 109 (Cd-109) | 48 | 461.9 days | 109 (61 neutrons) | Electron Capture |
| Cobalt 57 (Co-57) | 27 | 271.74 days | 57 (30 neutrons) | Electron Capture |
| Cobalt 60 (Co-60) | 27 | 5.27 years | 60 (33 neutrons) | Beta |
| Cesium 137 (Cs-137) | 55 | 30.08 years | 137 (82 neutrons) | Beta |
| Europium 152 (Eu-152) | 63 | 13.51 years | 152 (89 neutrons) | Electron Capture |
| Iron 55 (Fe-55) | 26 | 2.744 years | 55 (29 neutrons) | Electron Capture |
| Manganese 54 (Mn-54) | 25 | 312.2 days | 54 (29 neutrons) | Electron Capture |
| Sodium 22 (Na-22) | 11 | 2.6 years | 22 (11 neutrons) | Beta |
| Polonium (Po-210) | 84 | 138.37 days | 210 (126 neutrons) | Alpha |
| Strontium (Sr-90) | 38 | 28.79 years | 90 (52 neutrons) | Beta |
| Thallium 204 (Tl-204) | 81 | 3.78 years | 204 (123 neutrons) | Beta |
| Zinc 65 (Zn-65) | 25 | 243.93 days | 54 (29 neutrons) | Electron Capture |
Disk Source Sets - RSS2 - GM Resolving Time Source Set
The RSS2 source set is used for determining the resolving time of GM counters. It consists of 3 half-disks: 2 contain Tl-204 and 1 is left blank (contains no material). All RSS2 sources have an uncertainty of ± 20% of the labeled activity.
| RSS2 |
(2) Tl-204, 5 µCi (185 kBq), sealed half-disk sources (1) Blank half-disk |
| RSS2EU |
(2) Tl-204, 0.25 µCi (9.25 kBq), sealed half-disk sources (1) Blank half-disk |
RSS3 - Alpha/Beta/Gamma Source Set
The RSS3 source set is designed for demonstrating the basic characteristics of radiation. It consists of 3 disk sources: 1 gamma emitter, 1 beta emitter, and 1 alpha emitter. All RSS3 sources have an uncertainty of ± 20% of the labeled activity.
| RSS3 |
(1) Co-60, 1 µCi (37 kBq), sealed disk (1” diameter) (1) Sr-90, 0.1 µCi (3.7 kBq), sealed disk (1” diameter) (1) Po-210, 0.1 µCi (3.7 kBq), unsealed disk (1” diameter) |
| RSS3UN |
(1) Co-60, 0.5 µCi (18.5 kBq), sealed disk (1” diameter) (1) Sr-90, 0.1 µCi (3.7 kBq), sealed disk (1” diameter) (1) Po-210, 0.1 µCi (3.7 kBq), unsealed disk (1” diameter) |
RSS5 - Alpha/Beta/Gamma Source Set
The RSS5 source set is designed for demonstrating the basic characteristics of radiation. It consists of 5 disk sources: 2 gamma emitters, 2 beta emitters, and 1 alpha emitter. All RSS5 sources have an uncertainty of ± 20% of the labeled activity.
| RSS5 |
(1) Co-60, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) Cs-137, 5 μCi (185 kBq), sealed disk (1″ diameter) (1) Tl-204, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) Sr-90, 0.1 μCi (3.7 kBq), sealed disk (1″ diameter) (1) Po-210, 0.1 μCi (3.7 kBq), unsealed disk (1″ diameter) |
| RSS5EU |
(1) Co-60, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) Cs-137, 0.25 μCi (9.25 kBq), sealed disk (1″ diameter) (1) Tl-204, 0.25 μCi (9.25 kBq), sealed disk (1″ diameter) (1) Sr-90, 0.1 μCi (3.7 kBq), sealed disk (1″ diameter) (1) Po-210, 0.1 μCi (3.7 kBq), unsealed disk (1″ diameter) |
RSS8 - Gamma Source Set
The RSS8 source set is designed for gamma spectroscopy. It consists of 8 different gamma emitting isotopes that cover the entire range from 32 keV to 1332.49 keV. All disk sources have an uncertainty of ± 20% of the labeled activity unless calibrated (± 5%) for an additional cost
| RSS8 |
(1) Ba-133, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) Cd-109, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) Co-57, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) Co-60, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) Cs-137, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) Eu-152, 0.5 μCi (18.5 kBq), sealed disk (1″ diameter) (1) Na-22, 1 μCi (37 kBq), sealed disk (1″ diameter) (1) “Mixed Unknown” – Cs-137, Zn-65; 0.5 μCi (18.5 kBq), 1 μCi (37 kBq); sealed disk (1″ diameter) |
